FEEL the Comfort!
KELLY Trumpet Mouthpieces are made entirely of Lexan® material. The cup sizes are patterned after the Bach® series, sampled by Kelly's professional staff and are adjusted to produce their final, comfortable, easy-blowing mouthpieces. Kelly standard trumpet mouthpieces all have a larger throat diameter than their Bach® counterparts.
Cup Diameter: .67"
Cup Depth: .55"
Inside Diameter of Receiver: .43"